docs: move update to dev

Author: RHReynolds

CHANGELOG.md

@@ -3,12 +3,16 @@
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## dev
+
+### Enhancements and fixes
+- [[PR #1126](https://github.com/nf-core/rnaseq/pull/1126) - Fixes error when transcript_fasta not provided and skip_gtf_filter set to true (issue [#1125](https://github.com/nf-core/rnaseq/issues/1125))
+
 ## [[3.13.1](https://github.com/nf-core/rnaseq/releases/tag/3.13.1)] - 2023-11-17
 
 ### Enhancements and fixes
 
 - [[PR #1121](https://github.com/nf-core/rnaseq/pull/1121) - Changes for 3.13.1 patch release incl. igenomes star fix
-- [[PR #1126](https://github.com/nf-core/rnaseq/pull/1126) - Fixes error when transcript_fasta not provided and skip_gtf_filter set to true (issue [#1125](https://github.com/nf-core/rnaseq/issues/1125))
 
 ## [[3.13.0](https://github.com/nf-core/rnaseq/releases/tag/3.13.0)] - 2023-11-17